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| author |   Tony Lindgren <tony@atomide.com> | 2017-03-06 08:37:53 -0800 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2017-03-06 08:37:53 -0800 |
| commit | e24bce8fb4c26bd0d8eca74cbbee1ad049246be3 (patch) | |
| tree | c219c2ec183633aa15841fca5b055a09d2d0b980 /lib/dma-debug.c | |
| parent | ARM: OMAP2+: Release device node after it is no longer needed. (diff) | |
| parent | Linux 4.11-rc1 (diff) | |
| download | linux-rng-e24bce8fb4c26bd0d8eca74cbbee1ad049246be3.tar.xz linux-rng-e24bce8fb4c26bd0d8eca74cbbee1ad049246be3.zip | |
Merge tag 'v4.11-rc1' into omap-for-v4.11/fixes
Linux 4.11-rc1
Diffstat (limited to 'lib/dma-debug.c')
| -rw-r--r-- | lib/dma-debug.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/dma-debug.c b/lib/dma-debug.c index 8971370bfb16..b157b46cc9a6 100644 --- a/lib/dma-debug.c +++ b/lib/dma-debug.c @@ -17,8 +17,10 @@ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ +#include <linux/sched/task_stack.h> #include <linux/scatterlist.h> #include <linux/dma-mapping.h> +#include <linux/sched/task.h> #include <linux/stacktrace.h> #include <linux/dma-debug.h> #include <linux/spinlock.h> @@ -1155,6 +1157,11 @@ static void check_unmap(struct dma_debug_entry *ref) dir2name[ref->direction]); } + /* + * Drivers should use dma_mapping_error() to check the returned + * addresses of dma_map_single() and dma_map_page(). + * If not, print this warning message. See Documentation/DMA-API.txt. + */ if (entry->map_err_type == MAP_ERR_NOT_CHECKED) { err_printk(ref->dev, entry, "DMA-API: device driver failed to check map error" |